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DTSTART:20070311T020000
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DTSTAMP:20230921T144021
DTSTART;TZID=America/Detroit:20230929T150000
DTEND;TZID=America/Detroit:20230929T160000
SUMMARY:Workshop / Seminar:Combinatorics Seminar - From Scattering Amplitudes to Catalan combinatorics
DESCRIPTION:In this talk\, I will give a gentle overview of recent developments at the intersection of combinatorics\, real\, complex and tropical geometry and theoretical particle physics.  The beating heart of that intersection is the Cachazo-He-Yuan (CHY) integral formulation of Quantum Field Theory\, and its generalization by Cachazo-Early-Guevara-Mizera (CEGM) to moduli spaces of points in projective spaces of any dimension.  The values of these integrals are rational functions of certain kinematic invariants\, closely related to a richly structured object\, the tropical Grassmannian\; when these invariants are taken to be non-generic\, beautiful combinatorics emerges.  We explore that combinatorics.  We also describe novel connections to oriented matroids and positive geometry\, as introduced by Arkani-Hamed\, Bai and Lam.
UID:109718-21822729@events.umich.edu
URL:https://events.umich.edu/event/109718
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Mathematics
LOCATION:East Hall - 4096
CONTACT:
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